Bob is investigating whether new restrictions on waste product disposal from poultry farms have reduced Nitrogen pollution in nearby aquifers. Fromprior measurements, the researcher knows that an average of 14.5 pounds of nitrogen per acre foot of water was present before the restrictions wereenacted. The researcher randomly selects 11 aquifers and collects one sample from each aquifer. The resulting values were used to produce thisoutput.Hypothesis test results:H: mean of variableH) : μ 14.5HA : μ< 14.5Variable Sample Mean Standard Deviation T-StatNitrogen 13.22.4???The test-statistic for this hypothesis test is missing. Find this value. Round your answer to 3 decimal places. You may assume the nitrogen contentwithin aquifers is normally distributed.Answer:

Bob is investigating whether new restrictions on waste product disposal from poultry farms have…

Answered: The test-statistic for this hypothesis…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Suppose that you want to perform a hypothesis test to compare several population means, using independent samples. In each case, decide whether you would use the one-way ANOVA test, the Kruskal–Wallis test, or neither of these tests. Preliminary data analyses of the samples suggest that the distributions of the variable are not normal and have quite different shapes.
For all hypothesis tests: State your null and alternative hypotheses Include the appropriate SPSS output Make your decision and conclusion Report the results of the test in proper APA style format A forensic psychologist is interested in assessing the prevalence of major depressive disorders among a sample of prison inmates. A random sample of inmates was selected and tested on the MDI (Major Depressive Inventory), a self-report instrument designed to measure levels of depression. Their scores were: 8, 10, 4, 11, 7, 10, 13, 4, 8, 7, 9, 3, 15, 10, 10, 10, & 13. Use descriptive statistics including sample size, skewness, kurtosis, mean, median, mode, range, and standard deviation to describe this sample. Write your results in a paragraph similar to the Results section of a manuscript. If the MDI has a µ = 10, is the depression of prison inmates significantly different than that of the general population? Test with an α = 0.05. What type of error is possible based on the outcome?
Find the P-value for the indicated hypothesis test with the given standardized test statistic, z. Decide significance a. Right-tailed test with test statistic z= 1.34 and a= 0.05 P-value = (Round to four decimal places as needed.) State your conclusion, O Fail to reject Ho O Reject Ho Click to select'your answer(s)
1) A study was conducted to determine whether the mean braking distance of four-cylinder cars is greater than the mean braking distance of six-cylinder cars. A random sample of 20 four-cylinder cars and a random sample of 20 six-cylinder cars were obtained, and the braking distance was measured. What would be the appropriate hypothesis test for this analysis? i t test ii t test for dependent samples (matched pair) iii z test iv z test for dependent samples (matched pair) v Test for correlation vi Goodness of fit test vii Test for association (homogeneous data sets) 2) A study of 10 different weight loss programs involved 500 subjects. Each of the 10 programs had 50 subjects. The subjects were followed for 12 months. Weight change for each subject was recorded. The researcher wants to test the claim that all ten programs are equally effective in weight loss. i t test ii t test for dependent samples…
Choosing the alpha level for a hypothesis test allows researchers to control the probability of committing a type II error. True or False? I see two different answers given for this question.
Suppose 225 subjects are treated with a drug that is used to treat pain and 51 of them developed nausea. Use a 0.10 significance level to test the claim that more than 20% of users develop nausea. Identify the test statistic for this hypothesis test. The test statistic for this hypothesis test is enter your response here. (Round to two decimal places as needed.) Identify the P-value for this hypothesis test. The P-value for this hypothesis test is enter your response here. (Round to three decimal places as needed.)
A right-tailed hypothesis test conducted with n = 196 and p = 0.58 has a test statistic of p=0.622. What is the observed level of significance, p, of this test? 0.1190 0.1511 O 0.1401 O 0.1170
For married couples, is there a significant difference in data usage between the two partners on their smartphones? A random sample of married couples were selected and their data usage over one particular month (chosen at random) was recorded. At the a = 0.10 level of significance, use the data given below to test the claim that there is no difference in data usage between partners. Let µp be the mean of the differences in data usage between partner 1 and partner 2 in each marriage. Assume that the differences have a normal distribution. (Round your results to three decimal places. Which would be correct hypotheses for this test? O Ho: HD = 0, H1: µp 0 O Ho: HD = 0, H1:µD > 0 GB of data used: Partner 1 Partner 2 1.74 3.98 2.53 2.42 4.03 2.42 1.16 3.22 1.93 1.5 3.12 1.43 2.93 2.41 2.76 3.05 2.48 3.28 3.56 2.76 1.33 4.38 3.37 3.47 1.71 2.64 3.81 2.28 Test Statistic:
A two-tailed test is performed at the 0.10 level of significance. The p-value is determined to be 0.07. The null hypothesis should not be rejected. must be rejected. could be rejected, depending on the sample size. has been designed incorrectly. O O O O
Suppose that you want to perform a hypothesis test to compare several population means, using independent samples. In each case, decide whether you would use the one-way ANOVA test, the Kruskal–Wallis test, or neither of these tests. Preliminary data analyses of the samples suggest that the distributions of the variable are not normal but have the same shape.
The p-value for a hypothesis test turns out to be 0.01734. At a 6% level of significance, what is the proper decision? O Reject Ho O Fail to reject Ho
A researcher has observed 500 vehicles at a stop in a suburban neighborhood and recorded the type of vehicle (sedan, hatchback, bakkie) and driver behavior ar the stop sign (complete stop, near stop, "ran" tha stop sign). At the 0.05 level of significance, could there be some relationship between driver behavior and the type of vehicle being driven? Define the null hypothesis and the alternative hypothesis.

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